Network former to radiofrequency antenna using the fast fourier transformed and structure materielle installing such a network, in particular for space applications

摘要

The invention relates to a network former of beams (cfh ") comprising the circuits performing a discrete fourier transform "filtered" two-dimensional, hexagonal, on the input signals so as to control the radiating elements of an antenna. The number of inputs is equal to nt, with t = n * * 2xr, the circuits comprise a first layer (5) formed from n identical cells (51a to 54d) performing a "filtered" interferometric rxr and a second layer consisting of r play independent (7, 8, 9), each set comprising the first (71 to 74, 81 to 84, 91 to 94) and second (75 to 78, 85 to 88 and 95 to 98) rows of n identical cells operating a dft "n" interferometric. & br / the invention also relates to the structure of the implantation of such a network (cfh "). br / application in particular to the control of the radiofrequency antennas of the type of network to the control of the phase for generating multiple beams, on board a satellite.